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AI summary

What is a company registration number?

What is a company registration number?

In the United Kingdom, a company registration number is the stable identifier Companies House assigns to a company or other registered body. It is used to retrieve the public register record and remains associated with that body when names or addresses change. It is separate from VAT, tax, and other jurisdiction-specific identifiers.

Published
2026-07-20
Retrieved
Not reported
Snapshot
sha256:321c31557fb18e12cbcd30e4759fbeb3c2344a4f50a16c9b8a1772b93d7ceb32
Data as of
2026-07-20

Source artifact receipts

Each receipt below describes its exact retained artifact or live source. Dates and digests never cross artifact boundaries.

Companies House public register

Evidence publisher: Companies House. Source date: 2026-07-20.

Published
Not reported
Retrieved
Not reported
Snapshot
Not retained for this live source artifact
Data as of
2026-07-20

No captured bytes are represented; use the live publisher link to re-check this source.

Scope and material limitation

What this answer covers

This answer uses the UK Companies House meaning because the validated query and canonical are UK scoped. Other jurisdictions issue different registration identifiers.

Dated source facts

What the cited record says

Source-snapshot manifest receipt

Reproducible lineage, explicitly unsigned

This receipt attests the source snapshot manifest, not any individual fact.

The answer-series chain record is unsigned. It does not authenticate a person, organization, eligibility state, or individual fact.

Snapshot manifest SHA-256
ccc07ba3cc067fc5bac55b3761f4fb912ae303abfe1e7393104aaa73e9ef4f85
Previous chain SHA-256
9ba1c57900325056a2f4c406707067234d0d15a427ccbc51f9401a110f0af737
Current chain SHA-256
031186650b1abc6f6b9c96cf4ff80cc7b3468a301efce7f247754b9b7a262b06
signature_linked_facts
0
Answer-series chain status
unsigned

Primary-source chain

Follow the answer to its source

  1. Companies House public registerCompanies HouseAccessed:

    Limitation: The company number identifies a Companies House record. It is separate from tax identifiers and does not make every filed statement independently confirmed.

Re-derive this answer from the cited government file; no Fonteum account is required.

Methodology and limitations

How to interpret this answer

Methodology version: citation-answer/v1

  • No filing-history, officer-search, or tax-identifier claim is made.
Read the methodology

Frequently asked questions

Questions about this answer

Does a UK company number change with the company name?
No. The number remains the register identifier even when mutable company details change.

What’s on file, by the numbers

Platform snapshot · 2026-08-24

13.4Mproviders & companiesProviders, organizations, owners, and facilities on file
26.2Msource-linked factsSource-linked field facts in the dated platform snapshot
90sources with dataDistinct snapshot source IDs with at least one positive record count
70fresh sourcesDistinct source IDs whose latest positive-data snapshot falls within the preceding 45 days
111sources integratedActive registry rows; integration does not establish a load
13state Medicaid jurisdictionsDistinct states represented in the state-exclusions serving table

Integrated, with-data, and fresh-observation counts are separate. No platform-wide source-completeness count is published. Completeness is source-specific and must be evaluated against the named source's expected scope. State coverage is a separate jurisdiction measure.

Source authority is record-specific

Use the issuer named on the record.

Fonteum spans federal, state, and global public publishers. A source page or returned record identifies its issuer and dataset where that metadata is available. A platform registry count does not assign every page to one authority or establish loaded, fresh, or complete coverage.

Browse source records and their stated limitations →

Reproducible by design

Inspect the evidence each published figure actually supplies.

Source and date

Research pages expose the named public file and observation date where those fields are available. Source-file SHA-256 coverage is separate; facts do not currently link deterministically to signatures.

Available derivation

Studies with a retained release and committed derivation link the SQL or method used. Other studies state the evidence and reproduction limits they actually have.

Daily observations

Dated table row-count observations can detect local drift. They do not imply that an upstream publisher released or Fonteum ingested new data that day.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

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